import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/User.vue'
import Rights from './components/power/Rights.vue'
import Roles from './components/power/Roles.vue'
Vue.use(Router)
const router= new Router({
    routes:[
        {path:'/',redirect:'/login'},
        {path:'/login',component:Login},
        {path:'/home',component:Home,
        redirect:'/welcome',
        children:[
          {path:'/welcome',component:Welcome}
          ,{path:'/users',component:Users},
          {path:'/rights',component:Rights},
          {path:'/roles',component:Roles}
        ]
      },
    ]
});
//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to将要访问的路径
  //from代表从哪个路径跳转而来
  //next是一个函数，表示放行
  //next() 放行，next（‘/login’）强制跳转
  if(to.path==='/login')return next()
  const tokerStr=window.sessionStorage.getItem('token')
  if(!tokerStr) return next('/login')
  next()
});
export default router